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Design and finite element analysis of metal-elastomer lined composite over wrapped spherical pressure vessel

机译：包裹球形压力容器内衬金属-弹性体的复合材料的设计与有限元分析

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Over the years, Composite Overwrapped Pressure Vessels (COPV) have been utilized in the aerospace and automotive industries. In the present work, a novel approach has been adopted in designing the liner and test the feasibility of adopted manufacturing and joining techniques. The selection of winding angle and thickness distribution of composite along the meridional direction of the pressure vessel is derived by using an analytical approach based on classical laminate theory. Further, Finite Element Modelling (FEM) software ABAQUS-6.14 is utilized and tested for minimum burst pressure load to account the effects of composite winding angle layup and effective thickness of liner and composite at the pole, dome and equator regions of COPV. Among the various failure criterion of COPV, liner buckling and bond failure between the liner and composite overwrap resulting in the creation of the debond region are considered. These failures are concerned with contact issues and can be minimised by proposing to include a hyperelastic elastomer layer between the liner and composite overwrap. The analytical and FE analysis approach towards predicting the strength response of composite under applied load showed good agreement. At minimum burst pressure load findings showed that overall behaviour, stress-strain distributions and effect of elastomer thickness on liner were found satisfactory. A critical study involving Finite Element Analysis (FEA) based liner alone burst pressure test, and credibility of joining techniques employed in assembly of liner is analysed and found acceptable.
机译：多年来，复合包裹压力容器（COPV）已用于航空航天和汽车行业。在目前的工作中，已采用一种新颖的方法来设计衬板并测试采用的制造和连接技术的可行性。通过基于经典层压理论的分析方法，得出复合材料沿压力容器子午线方向的缠绕角度和厚度分布的选择。此外，利用有限元建模（FEM）软件ABAQUS-6.14进行了最小爆破压力负载测试，以考虑复合绕组角度分布以及COPV极，圆顶和赤道区域衬板和复合材料有效厚度的影响。在COPV的各种失效准则中，考虑了衬垫屈曲以及衬垫与复合材料外包装之间的粘合失效，从而导致产生了脱胶区域。这些故障与接触问题有关，可以通过建议在内衬和复合材料外包装之间包括超弹性弹性体层来最大程度地减少这些故障。预测复合材料在施加载荷下的强度响应的分析和有限元分析方法显示出良好的一致性。在最小爆破压力载荷下，发现表明整体性能，应力应变分布以及弹性体厚度对衬里的影响均令人满意。一项关键的研究涉及基于有限元分析（FEA）的仅衬管爆破压力测试，并且对衬管组装中采用的连接技术的信誉进行了分析，发现可接受。

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